Learn how to leverage LINQ (Language Integrated Query) of C# to sort, filter, group content-items. This demo uses the following data in app:
- Persons - various people who are used in the data. A person can also have one or many favorite books.
- Books - books people wrote or contributed to. Books have authors and
Some notes before we start
All our code uses some general stuff explained here:
- to enable LINQ commands we always need:
@using System.Linq
- since LINQ often can't guess object types we are using, we often need to cast lists to:
IEnumerable<dynamic>
Since this makes our code harder to read, so we shorted that to Dynlist by adding this line to the beginning of the files:
@using Dynlist = System.Collections.Generic.IEnumerable<dynamic>;
- most of the code starts by retrieving a list of Books and Authors. This is done using:
App.Data["Books"]
- Since we want to use
dynamic types (which lets us write things like book.Name, we usually wrap it with:
AsList(App.Data["Books"])
- You'll sometimes see
@Html.Partial(...) - this is not important for the LINQ examples, so you can ignore this for now.